1988474 has 4 divisors (see below), whose sum is σ = 2982714. Its totient is φ = 994236.

The previous prime is 1988471. The next prime is 1988513. The reversal of 1988474 is 4748891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4748891 = 7 ⋅678413.

It can be written as a sum of positive squares in only one way, i.e., 1575025 + 413449 = 1255^2 + 643^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1988471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497117 + ... + 497120.

2^1988474 is an apocalyptic number.

1988474 is a deficient number, since it is larger than the sum of its proper divisors (994240).

1988474 is an equidigital number, since it uses as much as digits as its factorization.

1988474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994239.

The product of its digits is 64512, while the sum is 41.

The square root of 1988474 is about 1410.1326178768. The cubic root of 1988474 is about 125.7496077202.

The spelling of 1988474 in words is "one million, nine hundred eighty-eight thousand, four hundred seventy-four".